{
  "attestation": {
    "v": "1",
    "endpoint": "wba-thumbprint",
    "endpoint_version": "0.1.0",
    "ruleset_version": 1,
    "issued_at": "2026-08-24T10:15:40Z",
    "input_digest": "sha256:a9d595d708489f91e93104baa22b4cdf5e3beaa54fd6a26f9431897af083b8d8",
    "spec_anchor": {
      "name": "RFC 7638 JWK Thumbprint, with RFC 8037 Appendix A.3 for Ed25519",
      "version": "RFC 7638",
      "retrieved": "2026-08-23"
    },
    "verdict": "pass",
    "findings": [],
    "evidence": {
      "key_directory_reachable": true,
      "key_directory_url": "https://agent.bot.goog/.well-known/http-message-signatures-directory",
      "http_status": 200,
      "keys_found": 5,
      "keys": [
        {
          "index": 0,
          "kty": "OKP",
          "crv": "Ed25519",
          "kid": "mhxuPw",
          "alg": "EdDSA",
          "thumbprint": "_fmS_hfpckRfp1x7fDExtVKVaYtcu1WJX1Io5LIow24"
        },
        {
          "index": 1,
          "kty": "OKP",
          "crv": "Ed25519",
          "kid": "cYSMkA",
          "alg": "EdDSA",
          "thumbprint": "cBovpyiY9PIQIFEfaw7w_0Wwwwx4UF2LY6w0lQURHBU"
        },
        {
          "index": 2,
          "kty": "OKP",
          "crv": "Ed25519",
          "kid": "bUCe2A",
          "alg": "EdDSA",
          "thumbprint": "I10hzgxlf59i39kdp5Lib4Tfbg-FO4ZMwmAEDwG88bY"
        },
        {
          "index": 3,
          "kty": "OKP",
          "crv": "Ed25519",
          "kid": "DYiMjA",
          "alg": "EdDSA",
          "thumbprint": "ImfgehCo9CQ0CTvJyuAY3dt6p5xMvJVutWoGpHtmVME"
        },
        {
          "index": 4,
          "kty": "OKP",
          "crv": "Ed25519",
          "kid": "Ggh50g",
          "alg": "EdDSA",
          "thumbprint": "c8D-_KOv7e9F83sFV2aCQUY5EuDbEVp5_sN86S8bKTc"
        }
      ],
      "keyids_checked": [
        "_fmS_hfpckRfp1x7fDExtVKVaYtcu1WJX1Io5LIow24"
      ],
      "published_thumbprints": [
        "_fmS_hfpckRfp1x7fDExtVKVaYtcu1WJX1Io5LIow24",
        "cBovpyiY9PIQIFEfaw7w_0Wwwwx4UF2LY6w0lQURHBU",
        "I10hzgxlf59i39kdp5Lib4Tfbg-FO4ZMwmAEDwG88bY",
        "ImfgehCo9CQ0CTvJyuAY3dt6p5xMvJVutWoGpHtmVME",
        "c8D-_KOv7e9F83sFV2aCQUY5EuDbEVp5_sN86S8bKTc"
      ],
      "matches": {
        "_fmS_hfpckRfp1x7fDExtVKVaYtcu1WJX1Io5LIow24": {
          "matched": true,
          "key_index": 0
        }
      }
    },
    "notes": [
      "Every keyid names a key published in the directory, by its RFC 7638 thumbprint."
    ]
  },
  "signature": {
    "alg": "ed25519",
    "key_id": "aw-attest-2026-08",
    "value": "P5SOI/bLvE+i4TnGjvi5feeOS4bnuchIwMTt4Xu+0un7e03/qgv5df57bwrF6QOOazlg+qkBsobSCgZ+OyBfAg=="
  }
}